Drill.



' Patented May 2|, 190i. P. PEARSON.

D B l L L (Application filed Oct. 30, 1900.

(No Model.)

Wibnuooeo UNITED STATES PATENT OFFICE.

PETER PEARSON, OF RICHHILL, MISSOURI.

DRILL.

SPECIFICATION forming part of Letters Patent N 0. 674,428, dated May 21, 1901.

Application filed October 30, 1900. Serial No. 34.933. (No model.)

To all whom it may concern Be it known that I, PETER PEARSON, a citizen of the United States, residing at Rich-.

hill, in the county of Bates and Stateof Missouri, have invented a new and useful Drill,

of which the following is a specification.

This invention relates to improvements in drilling-machines; and the object is to prolarly pointed out in the claims, and clearly illustrated by the accbmpanying drawings, in which Figure 1 is a perspective view of a drillingmachine embodying my invention; Fig. 2, a vertical longitudinal sectional view; Fig. 3, a detail view of one of the swinging supports for the short driving-shafts, and Fig. 4 a detail view of the boxing.

Referring now more particularly to the accompanying drawings, A designates a supporting-platform formed of four boards connected at their ends and forming a central space. Raised from the side boards of the platform adjacent to the central space are the two uprights B, braced by rods 0. Pivoted to 'the-'upper ends of the uprights, so as to swing outwardly and downwardly therefrom, are arms D. Each of these arms supports a short driving-shaft E, carrying at its inner .end a beveled gear F and at its outer end a disk G, having a handle H, by means of which the shaft may be rotated. The inner ends of these short driving-shafts terminate short of each other, so that the gears F are separated. Arms D are secured in alinement with the standards by set-screws I.

J designates one-half of a sectional boxing having laterallyextending plates K, which are secured to the standards B and supportthe boxing centrally between the standards. Hinged to one of the plates K is a swinging section L of the boxing, which is locked in position, forming, with section J, a complete boxing by means of pin M passing through an eye N, formed on section L,and eyes 0,.formed on the opposite plate K. The boxing is provided adjacent to its upper end with an annular shoulder P and screw-threaded the remainder of its inner surface.

Q designates a beveled gear meshing with gears F, having a reduced portion R in the boxing and resting upon the annular shoulder P thereof. Said gear is formed with a centrally-disposed vertical passage to receive a screw-threaded tube S, which is movable therethrough, but held from independent r0- tation by a projection T, carried by the gear R and projecting into a longitudinally-extending slot U, formed in the tube S. The threads of this tube take the threads of the boxing, and as the gear Q is rotated said tube S is also rotated, and at the same time moved either upwardly or downwardly, according to the direction of rotation of the gear. Threaded on the lower end of tube S is a tubular bit V,

formed on its lower end with saw-like cuttingteeth W.

By operating either one or both of the driving-shafts E the bit is rotated and at the same time fed downwardly and quickly and efiectively drilling the coal or rock. By removing the set-screws I the arms supporting the driving-shafts may be swung outwardly out of gear. The spring-section L of the boxing may also be quickly and readily opened to permit the removal of the threaded tube S.

Tube S and bit V are provided with perforations X and Y, adjacent to their point of connection, to receive rods or any tool for the purpose of unscrewing or removing the bit.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A drilling-machine comprising a supporting-frame,parallel standards raised therefrom, a screw-threaded boxing supported by and disposed between said standards, a gear rotatably supported by said boxing, a screwthreaded drill-holder movable through said boxing and through the gear supported thereby but held from rotation independently of said gear, arms pivoted at the upper ends of said standards, transversely-extending shafts supported by said arms carrying on their inner ends gears meshing with the gears supported by the boxing and on their outer ends means for rotating them, and locking means for holding said arms in alinelnent with the standards, substantially as described.

2. A drilling-machine comprising a supporting-frame,paralle1 standards raised therefr0m,a connecting portion between said standards at their upper ends formed with a centrally-disposed semieylindrieal screw-threaded p0rtion,a swingingseetion of the same form as said seinieylindrical section, and screwthreaded and forming with said section a boxing, fastening means for securing said swinging section in operative position, swinging arms at the u pper ends of the standards,transversely-extending shafts supported by said arms carrying on their inner ends beveled PETER PEARSON.

Witnesses:

GEO. TEMPLETON, W. C. FOSTER. 

